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<a class="jxr_linenumber" name="1" href="#1">1</a>   <em class="jxr_comment">/*</em>
<a class="jxr_linenumber" name="2" href="#2">2</a>   <em class="jxr_comment"> * Copyright 2012 The Netty Project</em>
<a class="jxr_linenumber" name="3" href="#3">3</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="4" href="#4">4</a>   <em class="jxr_comment"> * The Netty Project licenses this file to you under the Apache License,</em>
<a class="jxr_linenumber" name="5" href="#5">5</a>   <em class="jxr_comment"> * version 2.0 (the "License"); you may not use this file except in compliance</em>
<a class="jxr_linenumber" name="6" href="#6">6</a>   <em class="jxr_comment"> * with the License. You may obtain a copy of the License at:</em>
<a class="jxr_linenumber" name="7" href="#7">7</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="8" href="#8">8</a>   <em class="jxr_comment"> *   <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em>
<a class="jxr_linenumber" name="9" href="#9">9</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="10" href="#10">10</a>  <em class="jxr_comment"> * Unless required by applicable law or agreed to in writing, software</em>
<a class="jxr_linenumber" name="11" href="#11">11</a>  <em class="jxr_comment"> * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT</em>
<a class="jxr_linenumber" name="12" href="#12">12</a>  <em class="jxr_comment"> * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the</em>
<a class="jxr_linenumber" name="13" href="#13">13</a>  <em class="jxr_comment"> * License for the specific language governing permissions and limitations</em>
<a class="jxr_linenumber" name="14" href="#14">14</a>  <em class="jxr_comment"> * under the License.</em>
<a class="jxr_linenumber" name="15" href="#15">15</a>  <em class="jxr_comment"> */</em>
<a class="jxr_linenumber" name="16" href="#16">16</a>  
<a class="jxr_linenumber" name="17" href="#17">17</a>  <strong class="jxr_keyword">package</strong> org.jboss.netty.handler.ipfilter;
<a class="jxr_linenumber" name="18" href="#18">18</a>  
<a class="jxr_linenumber" name="19" href="#19">19</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.logging.InternalLogger;
<a class="jxr_linenumber" name="20" href="#20">20</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.logging.InternalLoggerFactory;
<a class="jxr_linenumber" name="21" href="#21">21</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.util.internal.StringUtil;
<a class="jxr_linenumber" name="22" href="#22">22</a>  
<a class="jxr_linenumber" name="23" href="#23">23</a>  <strong class="jxr_keyword">import</strong> java.net.InetAddress;
<a class="jxr_linenumber" name="24" href="#24">24</a>  <strong class="jxr_keyword">import</strong> java.net.UnknownHostException;
<a class="jxr_linenumber" name="25" href="#25">25</a>  <strong class="jxr_keyword">import</strong> java.util.regex.Pattern;
<a class="jxr_linenumber" name="26" href="#26">26</a>  
<a class="jxr_linenumber" name="27" href="#27">27</a>  <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="28" href="#28">28</a>  <em class="jxr_javadoccomment"> * The Class PatternRule represents an IP filter rule using string patterns.</em>
<a class="jxr_linenumber" name="29" href="#29">29</a>  <em class="jxr_javadoccomment"> * &lt;br&gt;</em>
<a class="jxr_linenumber" name="30" href="#30">30</a>  <em class="jxr_javadoccomment"> * Rule Syntax:</em>
<a class="jxr_linenumber" name="31" href="#31">31</a>  <em class="jxr_javadoccomment"> * &lt;br&gt;</em>
<a class="jxr_linenumber" name="32" href="#32">32</a>  <em class="jxr_javadoccomment"> * &lt;pre&gt;</em>
<a class="jxr_linenumber" name="33" href="#33">33</a>  <em class="jxr_javadoccomment"> * Rule ::= [n|i]:address          n stands for computer name, i for ip address</em>
<a class="jxr_linenumber" name="34" href="#34">34</a>  <em class="jxr_javadoccomment"> * address ::= &amp;lt;regex&amp;gt; | localhost</em>
<a class="jxr_linenumber" name="35" href="#35">35</a>  <em class="jxr_javadoccomment"> * regex is a regular expression with '*' as multi character and '?' as single character wild card</em>
<a class="jxr_linenumber" name="36" href="#36">36</a>  <em class="jxr_javadoccomment"> * &lt;/pre&gt;</em>
<a class="jxr_linenumber" name="37" href="#37">37</a>  <em class="jxr_javadoccomment"> * &lt;br&gt;</em>
<a class="jxr_linenumber" name="38" href="#38">38</a>  <em class="jxr_javadoccomment"> * Example: allow localhost:</em>
<a class="jxr_linenumber" name="39" href="#39">39</a>  <em class="jxr_javadoccomment"> * &lt;br&gt;</em>
<a class="jxr_linenumber" name="40" href="#40">40</a>  <em class="jxr_javadoccomment"> * new PatternRule(true, "n:localhost")</em>
<a class="jxr_linenumber" name="41" href="#41">41</a>  <em class="jxr_javadoccomment"> * &lt;br&gt;</em>
<a class="jxr_linenumber" name="42" href="#42">42</a>  <em class="jxr_javadoccomment"> * Example: allow local lan:</em>
<a class="jxr_linenumber" name="43" href="#43">43</a>  <em class="jxr_javadoccomment"> * &lt;br&gt;</em>
<a class="jxr_linenumber" name="44" href="#44">44</a>  <em class="jxr_javadoccomment"> * new PatternRule(true, "i:192.168.0.*")</em>
<a class="jxr_linenumber" name="45" href="#45">45</a>  <em class="jxr_javadoccomment"> * &lt;br&gt;</em>
<a class="jxr_linenumber" name="46" href="#46">46</a>  <em class="jxr_javadoccomment"> * Example: block all</em>
<a class="jxr_linenumber" name="47" href="#47">47</a>  <em class="jxr_javadoccomment"> * &lt;br&gt;</em>
<a class="jxr_linenumber" name="48" href="#48">48</a>  <em class="jxr_javadoccomment"> * new PatternRule(false, "n:*")</em>
<a class="jxr_linenumber" name="49" href="#49">49</a>  <em class="jxr_javadoccomment"> * &lt;br&gt;</em>
<a class="jxr_linenumber" name="50" href="#50">50</a>  <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="51" href="#51">51</a>  <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../org/jboss/netty/handler/ipfilter/PatternRule.html">PatternRule</a> <strong class="jxr_keyword">implements</strong> IpFilterRule, Comparable&lt;Object&gt; {
<a class="jxr_linenumber" name="52" href="#52">52</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../org/jboss/netty/logging/InternalLogger.html">InternalLogger</a> logger = InternalLoggerFactory.getInstance(PatternRule.<strong class="jxr_keyword">class</strong>);
<a class="jxr_linenumber" name="53" href="#53">53</a>  
<a class="jxr_linenumber" name="54" href="#54">54</a>      <strong class="jxr_keyword">private</strong> Pattern ipPattern;
<a class="jxr_linenumber" name="55" href="#55">55</a>  
<a class="jxr_linenumber" name="56" href="#56">56</a>      <strong class="jxr_keyword">private</strong> Pattern namePattern;
<a class="jxr_linenumber" name="57" href="#57">57</a>  
<a class="jxr_linenumber" name="58" href="#58">58</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">boolean</strong> isAllowRule = <strong class="jxr_keyword">true</strong>;
<a class="jxr_linenumber" name="59" href="#59">59</a>  
<a class="jxr_linenumber" name="60" href="#60">60</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">boolean</strong> localhost;
<a class="jxr_linenumber" name="61" href="#61">61</a>  
<a class="jxr_linenumber" name="62" href="#62">62</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> String pattern;
<a class="jxr_linenumber" name="63" href="#63">63</a>  
<a class="jxr_linenumber" name="64" href="#64">64</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="65" href="#65">65</a>  <em class="jxr_javadoccomment">     * Instantiates a new pattern rule.</em>
<a class="jxr_linenumber" name="66" href="#66">66</a>  <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="67" href="#67">67</a>  <em class="jxr_javadoccomment">     * @param allow   indicates if this is an allow or block rule</em>
<a class="jxr_linenumber" name="68" href="#68">68</a>  <em class="jxr_javadoccomment">     * @param pattern the filter pattern</em>
<a class="jxr_linenumber" name="69" href="#69">69</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="70" href="#70">70</a>      <strong class="jxr_keyword">public</strong> <a href="../../../../../org/jboss/netty/handler/ipfilter/PatternRule.html">PatternRule</a>(<strong class="jxr_keyword">boolean</strong> allow, String pattern) {
<a class="jxr_linenumber" name="71" href="#71">71</a>          isAllowRule = allow;
<a class="jxr_linenumber" name="72" href="#72">72</a>          <strong class="jxr_keyword">this</strong>.pattern = pattern;
<a class="jxr_linenumber" name="73" href="#73">73</a>          parse(pattern);
<a class="jxr_linenumber" name="74" href="#74">74</a>      }
<a class="jxr_linenumber" name="75" href="#75">75</a>  
<a class="jxr_linenumber" name="76" href="#76">76</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="77" href="#77">77</a>  <em class="jxr_javadoccomment">     * returns the pattern.</em>
<a class="jxr_linenumber" name="78" href="#78">78</a>  <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="79" href="#79">79</a>  <em class="jxr_javadoccomment">     * @return the pattern</em>
<a class="jxr_linenumber" name="80" href="#80">80</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="81" href="#81">81</a>      <strong class="jxr_keyword">public</strong> String getPattern() {
<a class="jxr_linenumber" name="82" href="#82">82</a>          <strong class="jxr_keyword">return</strong> pattern;
<a class="jxr_linenumber" name="83" href="#83">83</a>      }
<a class="jxr_linenumber" name="84" href="#84">84</a>  
<a class="jxr_linenumber" name="85" href="#85">85</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> isAllowRule() {
<a class="jxr_linenumber" name="86" href="#86">86</a>          <strong class="jxr_keyword">return</strong> isAllowRule;
<a class="jxr_linenumber" name="87" href="#87">87</a>      }
<a class="jxr_linenumber" name="88" href="#88">88</a>  
<a class="jxr_linenumber" name="89" href="#89">89</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> isDenyRule() {
<a class="jxr_linenumber" name="90" href="#90">90</a>          <strong class="jxr_keyword">return</strong> !isAllowRule;
<a class="jxr_linenumber" name="91" href="#91">91</a>      }
<a class="jxr_linenumber" name="92" href="#92">92</a>  
<a class="jxr_linenumber" name="93" href="#93">93</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> contains(InetAddress inetAddress) {
<a class="jxr_linenumber" name="94" href="#94">94</a>          <strong class="jxr_keyword">if</strong> (localhost) {
<a class="jxr_linenumber" name="95" href="#95">95</a>              <strong class="jxr_keyword">if</strong> (isLocalhost(inetAddress)) {
<a class="jxr_linenumber" name="96" href="#96">96</a>                  <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">true</strong>;
<a class="jxr_linenumber" name="97" href="#97">97</a>              }
<a class="jxr_linenumber" name="98" href="#98">98</a>          }
<a class="jxr_linenumber" name="99" href="#99">99</a>          <strong class="jxr_keyword">if</strong> (ipPattern != <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="100" href="#100">100</a>             <strong class="jxr_keyword">if</strong> (ipPattern.matcher(inetAddress.getHostAddress()).matches()) {
<a class="jxr_linenumber" name="101" href="#101">101</a>                 <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">true</strong>;
<a class="jxr_linenumber" name="102" href="#102">102</a>             }
<a class="jxr_linenumber" name="103" href="#103">103</a>         }
<a class="jxr_linenumber" name="104" href="#104">104</a>         <strong class="jxr_keyword">if</strong> (namePattern != <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="105" href="#105">105</a>             <strong class="jxr_keyword">if</strong> (namePattern.matcher(inetAddress.getHostName()).matches()) {
<a class="jxr_linenumber" name="106" href="#106">106</a>                 <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">true</strong>;
<a class="jxr_linenumber" name="107" href="#107">107</a>             }
<a class="jxr_linenumber" name="108" href="#108">108</a>         }
<a class="jxr_linenumber" name="109" href="#109">109</a>         <strong class="jxr_keyword">return</strong> false;
<a class="jxr_linenumber" name="110" href="#110">110</a>     }
<a class="jxr_linenumber" name="111" href="#111">111</a> 
<a class="jxr_linenumber" name="112" href="#112">112</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> parse(String pattern) {
<a class="jxr_linenumber" name="113" href="#113">113</a>         <strong class="jxr_keyword">if</strong> (pattern == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="114" href="#114">114</a>             <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="115" href="#115">115</a>         }
<a class="jxr_linenumber" name="116" href="#116">116</a> 
<a class="jxr_linenumber" name="117" href="#117">117</a>         String[] acls = StringUtil.split(pattern, ',');
<a class="jxr_linenumber" name="118" href="#118">118</a> 
<a class="jxr_linenumber" name="119" href="#119">119</a>         String ip = <span class="jxr_string">""</span>;
<a class="jxr_linenumber" name="120" href="#120">120</a>         String name = <span class="jxr_string">""</span>;
<a class="jxr_linenumber" name="121" href="#121">121</a>         <strong class="jxr_keyword">for</strong> (String c : acls) {
<a class="jxr_linenumber" name="122" href="#122">122</a>             c = c.trim();
<a class="jxr_linenumber" name="123" href="#123">123</a>             <strong class="jxr_keyword">if</strong> (<span class="jxr_string">"n:localhost"</span>.equals(c)) {
<a class="jxr_linenumber" name="124" href="#124">124</a>                 localhost = <strong class="jxr_keyword">true</strong>;
<a class="jxr_linenumber" name="125" href="#125">125</a>             } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (c.startsWith(<span class="jxr_string">"n:"</span>)) {
<a class="jxr_linenumber" name="126" href="#126">126</a>                 name = addRule(name, c.substring(2));
<a class="jxr_linenumber" name="127" href="#127">127</a>             } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (c.startsWith(<span class="jxr_string">"i:"</span>)) {
<a class="jxr_linenumber" name="128" href="#128">128</a>                 ip = addRule(ip, c.substring(2));
<a class="jxr_linenumber" name="129" href="#129">129</a>             }
<a class="jxr_linenumber" name="130" href="#130">130</a>         }
<a class="jxr_linenumber" name="131" href="#131">131</a>         <strong class="jxr_keyword">if</strong> (ip.length() != 0) {
<a class="jxr_linenumber" name="132" href="#132">132</a>             ipPattern = Pattern.compile(ip);
<a class="jxr_linenumber" name="133" href="#133">133</a>         }
<a class="jxr_linenumber" name="134" href="#134">134</a>         <strong class="jxr_keyword">if</strong> (name.length() != 0) {
<a class="jxr_linenumber" name="135" href="#135">135</a>             namePattern = Pattern.compile(name);
<a class="jxr_linenumber" name="136" href="#136">136</a>         }
<a class="jxr_linenumber" name="137" href="#137">137</a>     }
<a class="jxr_linenumber" name="138" href="#138">138</a> 
<a class="jxr_linenumber" name="139" href="#139">139</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> String addRule(String pattern, String rule) {
<a class="jxr_linenumber" name="140" href="#140">140</a>         <strong class="jxr_keyword">if</strong> (rule == <strong class="jxr_keyword">null</strong> || rule.length() == 0) {
<a class="jxr_linenumber" name="141" href="#141">141</a>             <strong class="jxr_keyword">return</strong> pattern;
<a class="jxr_linenumber" name="142" href="#142">142</a>         }
<a class="jxr_linenumber" name="143" href="#143">143</a>         <strong class="jxr_keyword">if</strong> (pattern.length() != 0) {
<a class="jxr_linenumber" name="144" href="#144">144</a>             pattern += <span class="jxr_string">"|"</span>;
<a class="jxr_linenumber" name="145" href="#145">145</a>         }
<a class="jxr_linenumber" name="146" href="#146">146</a>         rule = rule.replaceAll(<span class="jxr_string">"&#92;&#92;."</span>, <span class="jxr_string">"&#92;&#92;&#92;&#92;."</span>);
<a class="jxr_linenumber" name="147" href="#147">147</a>         rule = rule.replaceAll(<span class="jxr_string">"&#92;&#92;*"</span>, <span class="jxr_string">".*"</span>);
<a class="jxr_linenumber" name="148" href="#148">148</a>         rule = rule.replaceAll(<span class="jxr_string">"&#92;&#92;?"</span>, <span class="jxr_string">"."</span>);
<a class="jxr_linenumber" name="149" href="#149">149</a>         pattern += '(' + rule + ')';
<a class="jxr_linenumber" name="150" href="#150">150</a>         <strong class="jxr_keyword">return</strong> pattern;
<a class="jxr_linenumber" name="151" href="#151">151</a>     }
<a class="jxr_linenumber" name="152" href="#152">152</a> 
<a class="jxr_linenumber" name="153" href="#153">153</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">boolean</strong> isLocalhost(InetAddress address) {
<a class="jxr_linenumber" name="154" href="#154">154</a>         <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="155" href="#155">155</a>             <strong class="jxr_keyword">if</strong> (address.equals(InetAddress.getLocalHost())) {
<a class="jxr_linenumber" name="156" href="#156">156</a>                 <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">true</strong>;
<a class="jxr_linenumber" name="157" href="#157">157</a>             }
<a class="jxr_linenumber" name="158" href="#158">158</a>         } <strong class="jxr_keyword">catch</strong> (UnknownHostException e) {
<a class="jxr_linenumber" name="159" href="#159">159</a>             <strong class="jxr_keyword">if</strong> (logger.isInfoEnabled()) {
<a class="jxr_linenumber" name="160" href="#160">160</a>                 logger.info(<span class="jxr_string">"error getting ip of localhost"</span>, e);
<a class="jxr_linenumber" name="161" href="#161">161</a>             }
<a class="jxr_linenumber" name="162" href="#162">162</a>         }
<a class="jxr_linenumber" name="163" href="#163">163</a>         <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="164" href="#164">164</a>             InetAddress[] addrs = InetAddress.getAllByName(<span class="jxr_string">"127.0.0.1"</span>);
<a class="jxr_linenumber" name="165" href="#165">165</a>             <strong class="jxr_keyword">for</strong> (InetAddress addr : addrs) {
<a class="jxr_linenumber" name="166" href="#166">166</a>                 <strong class="jxr_keyword">if</strong> (addr.equals(address)) {
<a class="jxr_linenumber" name="167" href="#167">167</a>                     <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">true</strong>;
<a class="jxr_linenumber" name="168" href="#168">168</a>                 }
<a class="jxr_linenumber" name="169" href="#169">169</a>             }
<a class="jxr_linenumber" name="170" href="#170">170</a>         } <strong class="jxr_keyword">catch</strong> (UnknownHostException e) {
<a class="jxr_linenumber" name="171" href="#171">171</a>             <strong class="jxr_keyword">if</strong> (logger.isInfoEnabled()) {
<a class="jxr_linenumber" name="172" href="#172">172</a>                 logger.info(<span class="jxr_string">"error getting ip of localhost"</span>, e);
<a class="jxr_linenumber" name="173" href="#173">173</a>             }
<a class="jxr_linenumber" name="174" href="#174">174</a>         }
<a class="jxr_linenumber" name="175" href="#175">175</a>         <strong class="jxr_keyword">return</strong> false;
<a class="jxr_linenumber" name="176" href="#176">176</a>     }
<a class="jxr_linenumber" name="177" href="#177">177</a> 
<a class="jxr_linenumber" name="178" href="#178">178</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">int</strong> compareTo(Object o) {
<a class="jxr_linenumber" name="179" href="#179">179</a>         <strong class="jxr_keyword">if</strong> (o == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="180" href="#180">180</a>             <strong class="jxr_keyword">return</strong> -1;
<a class="jxr_linenumber" name="181" href="#181">181</a>         }
<a class="jxr_linenumber" name="182" href="#182">182</a>         <strong class="jxr_keyword">if</strong> (!(o instanceof PatternRule)) {
<a class="jxr_linenumber" name="183" href="#183">183</a>             <strong class="jxr_keyword">return</strong> -1;
<a class="jxr_linenumber" name="184" href="#184">184</a>         }
<a class="jxr_linenumber" name="185" href="#185">185</a>         <a href="../../../../../org/jboss/netty/handler/ipfilter/PatternRule.html">PatternRule</a> p = (PatternRule) o;
<a class="jxr_linenumber" name="186" href="#186">186</a>         <strong class="jxr_keyword">if</strong> (p.isAllowRule() &amp;&amp; !isAllowRule) {
<a class="jxr_linenumber" name="187" href="#187">187</a>             <strong class="jxr_keyword">return</strong> -1;
<a class="jxr_linenumber" name="188" href="#188">188</a>         }
<a class="jxr_linenumber" name="189" href="#189">189</a>         <strong class="jxr_keyword">if</strong> (pattern == <strong class="jxr_keyword">null</strong> &amp;&amp; p.pattern == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="190" href="#190">190</a>             <strong class="jxr_keyword">return</strong> 0;
<a class="jxr_linenumber" name="191" href="#191">191</a>         }
<a class="jxr_linenumber" name="192" href="#192">192</a>         <strong class="jxr_keyword">if</strong> (pattern != <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="193" href="#193">193</a>             <strong class="jxr_keyword">return</strong> pattern.compareTo(p.getPattern());
<a class="jxr_linenumber" name="194" href="#194">194</a>         }
<a class="jxr_linenumber" name="195" href="#195">195</a>         <strong class="jxr_keyword">return</strong> -1;
<a class="jxr_linenumber" name="196" href="#196">196</a>     }
<a class="jxr_linenumber" name="197" href="#197">197</a> 
<a class="jxr_linenumber" name="198" href="#198">198</a> }
</pre>
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